Oh wow the covers are really similar! Now it totally makes sense that one would remember one for the other; compare the image of Tremblay–Sorenson on Amazon (ht

Oh wow the covers are really similar! Now it totally makes sense that one would remember one for the other; compare the image of Tremblay–Sorenson on Amazon (https://images-na.ssl-images-amazon.com/images/I/31i7I+eER8L.jpg https://images-na.ssl-images-amazon.com/images/I/31i7I+eER8L...) with that of TAOCP (https://i.ebayimg.com/images/g/ZKoAAOSwfzZgPA~D/s-l640.jpg https://i.ebayimg.com/images/g/ZKoAAOSwfzZgPA~D/s-l640.jpg or https://www.oldbookshopofbordentown.com/pictures/WE24020.jpg?v=1585332776 https://www.oldbookshopofbordentown.com/pictures/WE24020.jpg...) — sure the colour is technically different when you look at them side-by-side, but with many similarities in the jacket like the font with the small uppercase letters, there's a huge overlap. (Thanks for that interesting email thread too.)